The showbiz matriarch was recently criticised after the reality TV star, now 30, revealed her mother had helped her with contraception following a conversation when she was just 14 years old, but Kris insists her actions were sensible.
She said: ''First of all when we made it to the doctor's office she was 15 years old, you can tell your child what you expect from them and what is the right thing to do, and what it is to be a well-rounded human being. Short of locking my kids in a closet...
''She was sharing with me that she felt this urge to be sexual and she felt this part of her life coming on, I did what I thought was the right thing to do, I drove her to the doctor, this doctor delivered all of my children, it was somebody I really trusted, I thought if anyone could wrap their head around what is going on with Kim is my doctor.
''I took her there and said, 'Just make sure my daughter it protected, make sure she's safe, she needs an education' ... you just have to protect your kids.
Kris' youngest children Kylie and Kendall Jenner are 14 and 16 years old respectively but the 56-year-old star doesn't anticipate having to make similar decisions over their sexual welfare.
In a radio interview on 2Day FM's Kyle and Jackie O Show, she said: ''Kyle and Kendall seem to be much more immature in that way than Kim was at the time so I haven't had to cross that bridge, but certainly, if your child comes to you and says this is the way I'm feeling, what are you going to do, ignore that? I'd obviously had The Birds and The Bees talk long before...''